Page 38 - ICSE Chemistry 6
P. 38

• Copper is a good conductor of heat and electricity, and is used to make electrical wires.
                     • Tungsten, due to its high mel  ng point, is used to make fi laments of light bulbs.
                     • Silver, pla  num and gold are lustrous and a  rac  ve. These metals are used to make jewellery.
                     • Iron and steel are widely used in construc  on of buildings. They are also used to make heavy tools
                        and machinery.

                     • Coal, wood and natural gas are used as fuels. They produce heat energy on burning.
                     • Utensils used for cooking are made from metals like steel, copper and aluminum as they are good
                        conductors of heat.
                     • Metals like iron and copper are sonorous, and hence used to make bells.
                     • Plas  c is a bad conductor of heat and electricity, and is used to insulate wires. It is also used to
                        make non-s  ck cookwares.

                     • Carbon dioxide is used in fi re ex  nguishers as it does not support combus  on.
                     • Sand is used in the prepara  on of glass.
                     • Chlorine is used as a disinfectant.
                     • Argon is used in light bulbs as it does not react with metals at high temperature.

                     • Graphite is used to make lead of the pencils. It is also used to prepare lubricants.
                     • Diamond is a form of carbon. It is the hardest naturally occurring substance. It is considered as the
                        most precious gem. Impure diamond is used to cut glass.

                           Activity 2.2


                 Aim: To create a presenta  on on carbon and its compounds
                   •  Use the Internet to fi nd diff erent compounds of carbon and their uses. Using this informa  on, create
                       a PowerPoint presenta  on on the same topic. Insert related images and videos.
                   •  List at least 10 uses of carbon and its compounds in your presenta  on.
                   •  Format the presenta  on as per your choice.




                      Take a Break!

                     A. Name the following.

                      1.  Filament of a light bulb is made of this                    ____________________________
                      2.  Hardest naturally occurring substance                       ____________________________
                      3.  A sonorous metal                                            ____________________________
                     B. Write True (T) or False (F).

                      1.  Copper is used to make electrical wires.                                     ______________
                      2.  Plas  c is used in the prepara  on of sand.                                  ______________
                      3.  Argon reacts with metals at low temperature.                                 ______________

                      4.  Graphite is used to make lead pencils.                                       ______________
                      5.  Carbon dioxide is used in fi re ex  nguishers.                                ______________



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